DYNAMIC STATE ESTIMATION OF AN OPERATIONAL STATE OF A GENERATOR IN A POWER SYSTEM
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Abstract
Example embodiments described herein are directed towards dynamic state estimation of an operating state of a generator in a power system. Such estimation is performed for an individual generator in real time with improved accuracy and without the use of Global Position System (GPS) synchronization.
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Citations
81 Claims
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1-61. -61. (canceled)
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62. A method for Dynamic State Estimation, DSE, of an operational state of a generator in a power system, the method comprising:
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receiving measured voltage and current analog signals associated with the generator; sampling the received measured signals to voltage and current discrete signals; estimating magnitude, phase and frequency variables of the voltage and current, as well as associated voltage and current variances, respectively, for each variable, using the discrete voltage and current signals as an input in a Discrete Fourier Transform, DFT; calculating a power variable and associated power variance based on the estimated magnitude, phase and frequency variables of the voltage and current, as well as associated voltage and current variances for each variable; and estimating the dynamic state of the generator using at least a subset of the estimated magnitude, phase and frequency variables of the voltage and current, as well as associated voltage and current variances for each variable, and the calculated power variable and the associated power variance using a state estimator. - View Dependent Claims (63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79)
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80. An apparatus for Dynamic State Estimation, DSE, of an operational state of a generator in a power system, the apparatus comprising:
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a transceiver to receive measured voltage and current analog signals associated with the generator; a processor to sample the received measured signals to voltage and current discrete signals; the processor to estimate magnitude, phase and frequency variables of the voltage and current, as well as associated voltage and current variances, respectively, for each variable, using the discrete voltage and current signals as an input in a Discrete Fourier Transform, DFT; the processor to calculate a power variable and associated power variance based on the estimated magnitude, phase and frequency variables of the voltage and current, as well as associated voltage and current variances for each variable; and the processor to estimate the dynamic state of the generator using at least a subset of the estimated magnitude, phase and frequency variables of the voltage and current, as well as associated voltage and current variances for each variable, and the calculated power variable and the associate power variance using a state estimator.
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81. A computer readable medium having executable instructions stored thereon which, when executed by an apparatus for Dynamic State Estimation, DSE, of an operational state of a generator in a power system, cause the apparatus to:
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receive measured voltage and current analog signals associated with the generator; sample the received measured signals to voltage and current discrete signals; estimate magnitude, phase and frequency variables of the voltage and current, as well as associated voltage and current variances, respectively, for each variable, using the discrete voltage and current signals as an input in a Discrete Fourier Transform, DFT; calculate a power variable and associated power variance based on the estimated magnitude, phase and frequency variables of the voltage and current, as well as associated voltage and current variances for each variable; and estimate the dynamic state of the generator using at least a subset of the estimated magnitude, phase and frequency variables of the voltage and current, as well as associated voltage and current variances for each variable, and the calculated power variable and the associate power variance using a state estimator.
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Specification